AU2020321843A1 - Rapid cure paint technology - Google Patents
Rapid cure paint technology Download PDFInfo
- Publication number
- AU2020321843A1 AU2020321843A1 AU2020321843A AU2020321843A AU2020321843A1 AU 2020321843 A1 AU2020321843 A1 AU 2020321843A1 AU 2020321843 A AU2020321843 A AU 2020321843A AU 2020321843 A AU2020321843 A AU 2020321843A AU 2020321843 A1 AU2020321843 A1 AU 2020321843A1
- Authority
- AU
- Australia
- Prior art keywords
- paint
- paint composition
- optically transmissive
- weight
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003973 paint Substances 0.000 title claims abstract description 179
- 238000005516 engineering process Methods 0.000 title description 4
- 239000000203 mixture Substances 0.000 claims abstract description 108
- 239000011248 coating agent Substances 0.000 claims abstract description 48
- 238000000576 coating method Methods 0.000 claims abstract description 48
- 239000000470 constituent Substances 0.000 claims abstract description 35
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 239000000178 monomer Substances 0.000 claims abstract description 16
- 239000002253 acid Substances 0.000 claims abstract description 12
- 238000010422 painting Methods 0.000 claims abstract description 12
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 10
- 150000003573 thiols Chemical class 0.000 claims abstract description 10
- 239000011324 bead Substances 0.000 claims description 44
- 238000009472 formulation Methods 0.000 claims description 37
- 239000000945 filler Substances 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000049 pigment Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000006224 matting agent Substances 0.000 claims description 8
- 239000004608 Heat Stabiliser Substances 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- 239000001993 wax Substances 0.000 claims description 7
- 239000000080 wetting agent Substances 0.000 claims description 7
- 239000010453 quartz Substances 0.000 claims description 6
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 claims description 5
- VOBUAPTXJKMNCT-UHFFFAOYSA-N 1-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound CCCCCC(OC(=O)C=C)OC(=O)C=C VOBUAPTXJKMNCT-UHFFFAOYSA-N 0.000 claims description 5
- OAOABCKPVCUNKO-UHFFFAOYSA-N 8-methyl Nonanoic acid Chemical compound CC(C)CCCCCCC(O)=O OAOABCKPVCUNKO-UHFFFAOYSA-N 0.000 claims description 5
- -1 hydroxy furfuryl acrylate Chemical compound 0.000 claims description 5
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 claims description 5
- 229920001567 vinyl ester resin Polymers 0.000 claims description 5
- 239000013530 defoamer Substances 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 4
- 239000001053 orange pigment Substances 0.000 claims description 4
- 239000001052 yellow pigment Substances 0.000 claims description 4
- RZVINYQDSSQUKO-UHFFFAOYSA-N 2-phenoxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC1=CC=CC=C1 RZVINYQDSSQUKO-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010433 feldspar Substances 0.000 claims description 3
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 claims description 3
- 239000010434 nepheline Substances 0.000 claims description 3
- 229910052664 nepheline Inorganic materials 0.000 claims description 3
- 239000012860 organic pigment Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000010435 syenite Substances 0.000 claims description 3
- 239000011236 particulate material Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 description 19
- 230000004927 fusion Effects 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- 239000003086 colorant Substances 0.000 description 4
- 239000003550 marker Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 230000003301 hydrolyzing effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013036 cure process Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007903 penetration ability Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/506—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces
- E01F9/518—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces formed in situ, e.g. by painting, by casting into the road surface or by deforming the road surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1481—Spray pistols or apparatus for discharging particulate material
- B05B7/149—Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed
- B05B7/1495—Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed and with separate outlets for the particulate material and the liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/69—Particle size larger than 1000 nm
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/14—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces for heating or drying foundation, paving, or materials thereon, e.g. paint
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/16—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings
- E01C23/20—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings for forming markings in situ
- E01C23/22—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings for forming markings in situ by spraying
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/506—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces
- E01F9/524—Reflecting elements specially adapted for incorporation in or application to road surface markings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nanotechnology (AREA)
- Paints Or Removers (AREA)
- Road Repair (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The paint composition for painting a coating on a substrate adapted for accelerated cure by exposure to UV light. The composition of the paint includes a multifunctional acrylate oligomer in a concentration of between about 10 and 40% by weight; one or more of a multi and/or mono functional monomer of a concentration between about 15 and 50% by weight; a photoinitiator; thiol and/or mercaptan; and an acid functional acrylate. For road marking applications, the paint composition may also include optically transmissive materials and constituents to impart a particular colour to the paint.
Description
RAPID CURE PAINT TECHNOLOGY
Field of the invention
[0001 ] The present disclosure relates a paint composition, additives and methods of application for high speed curing of a painted coating on a substrate, and in particular paint for road marking purposes.
Background to the invention
[0002] In this specification, where reference has been made to external sources of information, including patent specifications and other documents, this is generally for the purpose of providing a context for discussing the features of the present invention. Unless stated otherwise, reference to such sources of information is not to be construed, in any jurisdiction, as an admission that such sources of information are prior art or form part of the common general knowledge in the art.
[0003] In the road marking industry, it is commonplace for at least a portion of road to be closed to traffic while painted lines are applied. The road is closed so that the road marking equipment can be operated safely, the road marking workers can be separated from active traffic, and also so that painted lines can dry before being exposed to traffic. Some forms of paint used for the painted lines can require up to 24 hours to fully cure to a state where traffic can be endured.
This means the road must be closed for a significant amount of time.
[0004] There have been some efforts made to reduce the time required for paint to dry and therefore the requirement for significant supporting closures. For example, US patent 4415603 reports a paint which is able to be cured in a time of 10 to 30 seconds by exposure to a strong UV light source. However, the strength of the light source required has prevented commercial application of this technology.
[0005] Firstly, the power of the UV light source required to achieve the 10 to 30 second dry time can only be provided by a high power fusion or arc lamp. Such lamps are fundamentally fragile and require enormous amounts of power. In a road marking environment, this means a very large power generator must be incorporated onto the road marking vehicle. The electrical generators are costly to run, physically large and therefore difficult to incorporate onto road marking vehicles. Further, the fusion lamp must be positioned at about 50 mm (2“) to the paint when applied to a road. Due to the fragility of the fusion lamp, they are easily broken by bumps in the road causing the road marking vehicle to strike the lamp on the road, breaking it, or even simply breaking due to movement while in use.
[0006] It is therefore an object of the present invention to improve upon the prior art, or at least provide the public with a useful choice.
Summary of the invention
[0007] According to some broad embodiments the invention relates to a road marking paint composition for painting a coating of a thickness up to 400 urn, when cured, on a road substrate adapted for accelerated cure by exposure to UV light, the composition comprising a paint formulation comprising: multifunctional acrylate oligomer in a concentration of between about 10 and 40% by weight; one or more of a multi and/or mono functional monomer of a concentration between about 15 and 50% by weight; a photoinitiator; thiol and/or mercaptan; and an acid functional acrylate; wherein the paint composition further comprises a first optically transmissive component, comprising a material adapted for substantial transparency to incident light of at least 365 to 405 nm mixed; and wherein the coating comprises a second optically transmissive component, comprising a material adapted for substantial transparency to incident light of at least 365 to 405 nm, the second optically transmissive component comprising a surface density of between about 500 and 700 g/m2. The road marking paint will typically also include one or more additives to impart colour to the paint, such as pigments and/or fillers.
[0008] According to some broad embodiments the invention relates to a paint composition for painting a coating on a substrate adapted for accelerated cure by exposure to UV light, the composition comprising a paint formulation comprising: multifunctional acrylate oligomer in a concentration of between about 10 and 40% by weight; one or more of a multi and/or mono functional monomer of a concentration between about 15 and 50% by weight; a photoinitiator; thiol and/or mercaptan; and an acid functional acrylate.
[0009] In some embodiments, the paint composition further comprises a first optically transmissive component, comprising a particulate material adapted for substantial transparency to incident light of at least 365 to 405 nm.
[0010] In some embodiments, the first optically transmissive component comprises quartz, nepheline syenite and/or feldspar filler.
In some embodiments, the first optically transmissive component are from 1 to 70 microns diameter.
[001 1 ] In some embodiments, the first optically transmissive component are up to 50 microns diameter.
[0012] In some embodiments, the first optically transmissive component is combined with the paint before painting the coating on the substrate.
[0013] In some embodiments, the paint composition further comprises a second optically transmissive component, comprising a material adapted for substantial transparency to incident light of at least 365 to 405 nm.
[0014] In some embodiments, the second optically transmissive component further comprises at least one or glass beads, angled glass and/or quartz agglomerates.
[0015] In some embodiments, the second optically transmissive component is generally spherical with an average diameter of from about 850 microns to about 1400 microns.
[0016] In some embodiments, the second optically transmissive component is adapted for combination with the paint formulation after application of the coating to the substrate.
[0017] In some embodiments, the second optically transmissive component is applied at a surface density of about 400 to 500 grams per square metre.
[0018] In some embodiments, the second optically transmissive component is applied at a surface density which substantially inhibits oxygen from contacting the coating.
[0019] In some embodiments, the acid functional acrylate is about 0.5 to 3 % by weight.
[0020] In some embodiments, the paint formulation further comprises a heat stabiliser constituent.
[0021 ] In some embodiments, the heat stabiliser constituent comprises about 0.1 to 0.5 % by weight.
[0022] In some embodiments, the paint formulation further comprises a wetting agent constituent.
[0023] In some embodiments, the wetting agent constituent comprises about 0.5 to 1 % by weight.
[0024] In some embodiments, the paint formulation further comprises a waxes constituent.
[0025] In some embodiments, the waxes constituent comprises about 0.3 to 0.6 % by weight.
[0026] In some embodiments, the paint formulation further comprises a matting agent or precipitated silica constituent.
[0027] In some embodiments, the matting agent or precipitated silica constituent comprises about 1 to 5 % by weight.
[0028] In some embodiments, the paint formulation further comprises a modified clays constituent.
[0029] In some embodiments, the modified clays constituent comprises about 0.5 to 2 % by weight.
[0030] In some embodiments, the paint formulation further comprises pigments and/or fillers adapted to colour the paint formulation.
[0031 ] In some embodiments, the pigments and/or fillers comprise one or more of titanium dioxide and/or organic yellow and/or orange pigments.
[0032] In some embodiments, the titanium dioxide comprises about 5 to 13 % by weight.
[0033] In some embodiments, the yellow and/or orange organic pigments comprises about 0.1 to 10 %.
[0034] In some embodiments, the one or more multifunctional acrylate oligomer comprises one or more of epoxy acrylate, polyester acrylate and/or urethane acrylate.
[0035] In some embodiments, the multi and/or mono functional monomers comprises at least one of isobornyl acrylate, hexanedioldiacrylate, versatic acid, vinyl ester, lauryl acrylate, tetra hydroxy furfuryl acrylate and/or phenoxy ethyl acrylate.
[0036] In some embodiments, the photoinitiator comprises bisacylphosphine oxide.
[0037] In some embodiments, the bisacylphosphine oxide comprises about 1 to 4 % by weight.
[0038] In some embodiments, the paint formulation further comprises a defoamer in a range of about 0.1 to 0.5 % by weight.
[0039] In some embodiments, the thiol and/or mercaptan comprises about 1 to 4 % by weight.
[0040] In some embodiments, the coating has a film thickness of up to about 400 micrometres when cured.
[0041 ] In some embodiments, the UV light has a wavelength in the range of about 365 to 405 nanometres.
[0042] In some embodiments, the UV light comprises by one or more LED components.
[0043] According to some broad embodiments the invention relates to a method of painting a coating on a substrate, comprising the steps of: spraying the paint formulation of any one of claims 1 to 37 to form the coating on the substrate; then applying the second optically transmissive component to the coating, wherein the second optically transmissive component is applied at a surface density of between about 500 and 700 g/m2 such that the coating is substantially shielded from environmental air; then exposing the coating and applied second optically transmissive component to a UV light from a UV light source.
[0044] In some embodiments, the UV light has a wavelength in the range of about 365 to 405 nanometres.
[0045] In some embodiments, the UV light source comprises one or more LED components.
[0046] In some embodiments, the invention relates to any one or more of the above statements in combination with any one or more of any of the other statements. Other aspects of the
invention may become apparent from the following description which is given by way of example only and with reference to the accompanying drawings.
[0047] The entire disclosures of all applications, patents and publications, cited above and below, if any, are hereby incorporated by reference. This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.
[0048] As used herein, the singular forms“a,”“an,” and“the” are intended to include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms “includes,”“comprises,”“including,” and/or“comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof It will be understood that when an element is referred to as being“connected” or“coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. As used herein, the term“and/or” includes any and all combinations of one or more of the associated listed items.
[0049] To those skilled in the art to which the invention relates, many changes in construction and widely differing embodiments and applications of the invention will suggest themselves without departing from the scope of the invention as defined in the appended claims. The disclosures and the descriptions herein are purely illustrative and are not intended to be in any sense limiting.
Brief description of the drawings
[0050] The invention can be better understood with reference to the following drawings. The elements of the drawings are not necessarily to scale relative to each other, emphasis instead being placed upon clearly illustrating the principles of the invention. Furthermore, like reference numerals designate corresponding parts throughout the views.
[0051 ] Figure 1 is a side view of an exemplary ground surface marker.
Detailed description of exemplary embodiments
[0052] Exemplary methods and systems are described herein. It should be understood that the word“exemplary” is used herein to mean“serving as an example, instance, or illustration.” Any embodiment or feature described herein as“exemplary” or“illustrative” is not necessarily to be construed as preferred or advantageous over other embodiments or features. More generally, the embodiments described herein are not meant to be limiting. It will be readily understood that certain aspects of the disclosed systems and methods can be arranged and combined in a wide variety of different configurations, all of which are contemplated herein.
[0053] Embodiments of the invention discussed herein relate to a paint composition which can be rapidly cured by a low power light source. In particular, cured by an LED light source which is comparatively low power compared to an arc or fusion light source. Compared to a fusion or arc light source, an LED light source has significant advantages in terms of manufacturing and operation costs, and an inherent robustness given their sold state nature. However, an LED light source has been historically unsuitable for paint curing in a road marking application because achieving the required optical power from an LED light source was not possible - only a fusion lamp could provide the optical power to dry paint in seconds.
[0054] Rather than rely on improvements in optical power which can be extracted from an LED light source or other adapted technology, the inventors have developed a paint composition which instead is operable for cure by an optical power in the range which can be provided by readily available LEDs.
[0055] The ability to use LEDs as a light source achieves commercial viability of a light-curable paint for road marking application. Firstly because the electrical power required to drive such an LED light is small and can easily be incorporated onto existing road marking equipment; and secondly, because LEDs are substantially more robust than a fusion lamp. Furthermore, an LED light source for the present application comprises a cluster of many individual LED sources. In cases where one or some LEDs are damaged in use, the cluster may be cheaply and easily repaired by replacing the individual components within a cluster, rather than the entire light source as would be the case for an arc or fusion lamp light source.
[0056] An LED light source, for example, generates about 1 .2 to 1 .8 W/cm2, whereas a Fusion or arc light source will generate around 2.5 to 3.0 W/cm2. However, the electrical power consumed by the LED light source is about 10 % that of the fusion light source. Further, the lifespan of an arc or fusion light source is about 5000 hours per bulb. Comparatively, an LED
light source has a lifespan closer to 25000 hours. Clearly then, a paint reactive to the power output of a LED based light source offers key advantages.
[0057] The paint composition of preferred embodiments is able to be fully cured in less than three seconds. In some cases, a road marking vehicle is able to cross a road, paint the required lines within the time required for a traffic light phase. This means that disruption to traffic is substantially avoided.
[0058] Practically, use of conventional road marking equipment has required a road or portion of a road to be closed to traffic - typically by arranging traffic cones and diverting traffic. Further, conventional road marking requires numerous support workers to manage traffic and traffic management devices, as well as the painting equipment and process itself. The deployment of workers to manage traffic and traffic cones, and the time required to paint a level 1 rural road intersection comprising of lead in line, limit line, arrow and symbol using convention paint would take around 100 minutes, including the time required for: 40 minutes to establish the site; 10 minutes to paint; 40 minutes to dry; 10 minutes to disestablish the site.
[0059] By way of comparison, the paint composition of the present invention can be applied at speeds of up to 20 km/h with substantially instant cure. Subsequently use of the present invention may not require any traffic diversion or road closure, and in some cases significantly reduces the need to numerous support workers. By way of comparison, to paint the same level 1 rural road intersection comprising of lead in line, limit line, arrow and symbol would take around 60 minutes, including the time for: 40 minutes establishment of site; 10 minutes to paint; up to 3 seconds drying time; disestablishment of site 10 minutes. This is a total saving of 40 minutes per intersection.
[0060] According to a first exemplary embodiment, there is paint composition for painting a coating on a substrate and the paint composition is adapted for accelerated cure by exposure to UV light. The composition comprises a paint formulation which is enhanced by combination with one or more types of optical components. The paint composition includes at least:
• multifunctional acrylate oligomer;
• one or more of a multi and/or mono functional monomer;
• a photoinitiator;
• thiol and/or mercaptan; and
• an acid functional acrylate.
[0061 ] In exemplary embodiments, the multifunctional acrylate oligomer has a concentration of between about 10 and 40% by weight. However, in alternative embodiments, the concentration may be one of about 9 to 39%; 10 to 38%; 1 1 to 37%; 12 to 36%; 13 to 37%; 14 to 38%; 15 to
37%; 16 to 36%; 17 to 35%; 18 to 34%; 19 to 33%; 20 to 32%; 21 to 31 %; 22 to 30%; 23 to 29%; 24 to 28%; or 25 to 27%.
[0062] The one or more multifunctional acrylate oligomer is selected from a group of one or more of epoxy acrylate, polyester acrylate and/or urethane acrylate. The desired form of paint application is to spray to a surface. Therefore, the concentration of the multifunctional acrylate oligomer may be varied to optimise the spray-ability of the paint depending on viscosity and ability to reduce to spray-able consistency.
[0063] In exemplary embodiments, the one or more multi and/or mono functional monomer is selected from a group including isobornyl acrylate, hexanedioldiacrylate, versatic acid, vinyl ester, lauryl acrylate, tetra hydroxy furfuryl acrylate and/or phenoxy ethyl acrylate. A selection may be made based on good diluting power, weather-ability, hydrolytic stability, adhesion to glass and mineral substrates. In exemplary embodiments, the multi and/or mono functional monomer is utilised to dilute to application viscosity whilst maintaining the 100% solids status.
[0064] In one exemplary embodiment, the one or more multi and/or mono functional monomer includes a combination of epoxy acrylate at a concentration of about 10 to 20 % by weight for efficient cure and toughness; polyvinyl chloride of about 2 to 10 % by weight for adhesion and flexibility, isobornyl acrylate of about 15 to 30 % by weight for spray-ability and adhesion, hexanedioldiacrylate of about 4 to 10 % by weight for cure efficiency, versatic acid vinyl ester of about 1 to 7 % by weight for matting orientation, weatherability and hydrolytic stability, and acid functional acrylate of about 0.5 to 3 % by weight for glass bead reception and adhesion to bitumen and chip thereby avoiding the need for a primer (except for applications on to some problematic substrates such as concrete substrates).
[0065] The particular combination of multi and/or mono functional monomers may be adjusted according to the desired properties of the paint. For example, increasing the concentration of a particular multi and/or mono functional monomer will offer improvements in the paint characteristics provided and adjustment may be required depending on, for example, the charactieristics of the surface material being painted. Generally, epoxy acrylate affects efficient cure and toughness; polyvinyl chloride affects adhesion and flexibility, isobornyl acrylate affects spray-ability and adhesion, hexanedioldiacrylate of affects cure efficiency, versatic acid vinyl ester affects matting orientation, weatherability and hydrolytic stability, and acid functional acrylate affects glass bead reception and adhesion.
[0066] In preferred embodiments, the multi and/or mono functional monomer has a
concentration of about 15 to 50 % by weight. However, in alternative embodiments, the concentration may be one of about 16 to 49%; 17 to 48%; 18 to 47%; 19 to 46%; 20 to 45%; 21
to 46%; 22 to 47%; 23 to 46%; 24 to 45%; 25 to 44%; 26 to 43%; 27 to 42%; 28 to 41 %; 29 to 40%; 30 to 39%; 31 to 38%; 32 to 37%; 33 to 36%; or 34 to 35% by weight.
[0067] In exemplary embodiments, the photoinitiator comprises bisacylphosphine oxide which has good reception of 365-405 nanometer light. The bisacylphosphine oxide comprises about 1 to 4 % by weight. However, in alternative embodiments, the concentration may be between about 1 .5 to 3.5; 2 to 3; or about 2.5 % by weight.
[0068] In exemplary embodiments, the thiol and/or mercaptan comprises about 1 to 4 % by weight. However, in alternative embodiments, the concentration may be between about 1 .5 to 3.5; 2 to 3; or about 2.5 % by weight. Further, the thiol and/or mercaptan offers an advantage of improving the adhesion of the paint to glass beads which may be incorporated into the paint and/or added to applied paint before the paint is cured.
[0069] While the above constituents form the fundamental constituents of the paint, further constituents may be added to the paint for practical purposes. For example, one or more of a heat stabiliser constituent, wetting agent, waxes, a matting agent, modified clays and/or a defoamer may be added to enhance practical circumstances such as spray-ability, stability of the paint mixture during storage, suitability for use with certain types of spray pumps and the like.
[0070] In exemplary applications, the paint is sprayed onto a surface in use, and a pump is used to pressurise the paint for spraying. Pumps for paint spraying applications typically generate heat which is transferred to the paint. To prevent the paint curing or partially curing in the pump or surrounding heated areas, a heat stabiliser constituent is added to the paint formulation. In exemplary embodiments, the heat stabiliser constituent is added in a range of about 0.1 to 0.5 % by weight. However, in alternative embodiments, the concentration may be between about 0.2 and 0.4 %, or about 0.3% by weight.
[0071 ] To further aid suitability for use with pumps which generate significant heat in use, in some embodiments, the paint formulation further comprises of waxes constituent which act to lubricate the pump. In some embodiments, the waxes constituent comprises about 0.3 to 0.6 % by weight. However, in alternative embodiments, the concentration may be about 0.4 to 0.5 % or 0.45 % by weight.
[0072] The acid functional acrylate functions as a cure stabiliser to keep the formulation stable in storage by maintaining a low pH which assists with shelf life extension.
[0073] In some exemplary embodiments the paint formulation further includes a matting agent or precipitated silica constituent. In some embodiments, the matting agent or precipitated silica
constituent comprises about 1 to 5 % by weight. However, in alternative embodiments, the concentration may be between about 1 .5 to 3.5; 2 to 3; or about 2.5 % by weight. A matting agent may be added to control the gloss or surface smoothness of the paint when applied.
[0074] In some exemplary embodiments the paint formulation further includes a modified clays constituent to control antisettle behaviour. In some embodiments, the modified clays constituent may be between about 0.5 to 2 % by weight. However, in alternative embodiments, the concentration may be between about 1 to 1 .5; or about 1 .25% by weight.
[0075] In some exemplary embodiments the paint formulation further includes a defoamer in a range of about 0.1 to 0.5 % by weight. However, in alternative embodiments, the concentration may be between about 0.2 to 0.4; or 0.3 % by weight.
[0076] Many commercial applications of the above described paint formulation require that the paint be a defined colour. For example, in a road environment, white, yellow and orange colours are most desired. Therefore, in some exemplary embodiments, the paint formulation further includes pigments and/or fillers adapted to colour the paint formulation.
[0077] For example, the paint formulation may have added the pigments and/or fillers such as one or more of titanium dioxide and/or organic yellow and/or orange pigments so that a desired paint colour is produced. Pigments and fillers are selected for white formulations (Titanium Dioxide) and other colours such as yellow (organic yellow and orange pigments) to maximise colour but minimise absorbance of UV light.
[0078] For a white paint, exemplary embodiments of the paint include titanium dioxide at a concentration of between about 5 and 13% by weight. For a yellow or orange paint, exemplary embodiments include yellow and/or orange organic pigments of between about 0.1 and 10% by weight. Many other colours are achievable by the use of suitable pigments known to control paint colours as are understood by those skilled in the art.
[0079] In some embodiments of the paint used for common road marking applications, optically transmissive filter particles are included in the paint composition to provide particular advantages. Exemplary forms of the filler is an optically transmissive particle selected from a group of one or more of Feldspar, quartz, crushed glass, nepheline syenite, and/or mica.
However, other materials offering transparency in at least the 365 to 405 nm region of the optical spectrum may be possible.
[0080] One particular advantage of the exemplary fillers added to the composition is to improve UV light penetration ability. The aforementioned fillers improve the curing process by spacing of the colour pigments and not reacting with the acid functional additives. Further, the distribution of optically transmissive filler within the paint composition provides for an optical pathway for UV
rays incident a sprayed coating. The optical pathway through the depth of the painted coating therefore allows for a thicker than conventional UV-cured coating to be sprayed and
successfully cured in a matter of seconds.
[0081 ] A thicker painted coating is often desirable to provide a longer duration between repainting intervals A conventional UV cured painted coating may have its painted coating thickness limited by the UV light penetration depth, which may be as little as 100 microns.
Current waterborne products need to be applied at around 550 urn wet film to achieve an about 300 urn dry film painted coating thickness. However, such a thickness takes several hours to dry and involves significant traffic management costs. Further, the long dry time is susceptible to weather disruptions - if the painted were to be rained on within hours after application, the paint may be ruined and have to be reapplied. However, in addition to the almost instant cure time, the paint of the present invention is able to be painted with a cured coating thickness of up to 400 microns is achievable as facilitated by the light paths formed by the filler.
[0082] To further optimise the advantages of the filler, the filler particle components are generally angular with an average particle size which may range from about 1 to 70 microns.
The filler is ideally added to the paint composition during manufacture, or at least before the paint is sprayed. In this way, the filler is interspersed within the paint with a substantially even distribution. In exemplary embodiments, the filler is 25 to 38% by weight and is best used with precipitated silica and the aforementioned modified clays to reduce settling on storage.
[0083] In further exemplary embodiments, a second optically transmissive component is added to the paint composition. However, the second component is added to the surface of the paint after application by spraying. For example, the second optically transmissive component is sprayed over a freshly sprayed paint, then the combination is subject to UV light for curing.
[0084] Again, the second optically transmissive component is a material adapted for substantial transparency to incident light of at least 365 to 405 nm and may be selected from a group of one or more of glass beads, angled glass and/or quartz agglomerates.
[0085] In some embodiments, the second optically transmissive component is generally spherical with an average diameter of from about 100 to 850 microns and/or 850 to 1400 microns.
[0086] The second optically transmissive components performs several tasks - first is to substantially inhibit oxygen from the painted coating on the substrate which may otherwise cause slowing of the UV cure process. For this task, the second optically transmissive component is ideally applied at a surface density of at least about 300 grams per square metre, and optimally between about 400 and 500 grams per square metre.
[0087] A further task of the second optically transmissive component is to provide retroreflective properties: In a road marking application, it is desirable for painted lines to be at least somewhat retroreflective such that the lines a highly visible to oncoming traffic. To achieve good retroreflective properties, the second optically transmissive component is ideally applied at a surface density of at least about 300 grams per square metre, and optimally between about 400 and 500 grams per square metre.
[0088] A further task of the second optically transmissive component is to facilitate light penetration into a painted coating and to couple light into the first optically transmissive components which are interspersed within the coating. Again, the second optically transmissive component is ideally applied at a surface density of at least about 300 grams per square metre, and optimally between about 400 and 700 grams per square metre.
[0089] In some exemplary embodiments, the second optically transmissive component are glass beads, such as glass beads selected from a group including one or more of Type A, B, C or D glass beads. Other retroreflective composites may also be used where substantially similar functionally equivalent optical properties are exhibited. In some embodiments, any Type of glass bead and/or composite may be combined to provide the second optically transmissive components applied as a surface layer to a painted coating on a substrate.
[0090] To optimise the advantages of the second optically transmissive components, a surface density of 400 to 500 grams per square metre is used for a painted coating thickness of about 150 to 250 microns. Or, a surface density of 500 to 700 grams per square metre is used for a painted coating thickness of about 250 to 400 microns. In some embodiments, a mix of type B and type D glass beads is used.
[0091 ] To further optimise the paint composition, including the first and or second optically transmissive components, the paint formulation further comprises a wetting agent constituent to adjust surface energy and ensure slight wrap-around, or wicking, of glass beads on the coating surface. The wicking acts to mechanically fasten the beads into the paint by extending more than halfway about the periphery of the bead while adequate surface area of the bead remains exposed such that retroreflective characteristics are not substantially impacted. Further, the wicking enhances skid resistance of the painted coating. Furthermore, the wicking effect allows for substantially higher wear resistance caused by the enhanced mechanical stability of the beads. In some exemplary embodiments, the wetting agent constituent is about 0.5 to 1 % by weight.
[0092] During manufacture, pigments and fillers are dispersed in the monomer and oligomer at high tip speed on dispersers until temperature reaches about 40 degrees Celsius, then
monomers are added to cool before adding heat sensitive components. The paint is packed off into polyethylene/propylene containers or epoxy lined drums and pails labelled with class 9 labels and skin irritant insignia.
[0093] Therefore, exemplary embodiments of the invention which have been described is a paint which is able to be sprayed but highly thixotropic virtually 100% solids (UV convertible) liquid designed to coat various road surfaces without running off peaks of aggregate in the wet state before receiving retro-reflective glass beads and substantially immediate cure. For practical application, operators will set paint spraying equipment to evenly distribute 180-250 micron layers of paint and run application machines at pre-set speeds depending on the number of UV lamps employed to ensure good through cure after bead application.
[0094] Cures time of 1 .5 seconds at a dry coating thickness of 300um have been demonstrated, when combined with a mixture of Type B and D glass beads as a surface layer.
[0095] The need for an adhesion primer to be applied to a road surface before application of the paint is avoided, meaning single coat of paint can be sprayed paint coat except for the aforementioned concrete substances.
[0096] Methods of painting a road making use of the paint composition of the above described embodiments typically include the steps of spraying the paint to form a painted coating on the road. The spray equipment may be airless or may be designed to optimise sprayability of the paint such by application of a pump suitable for spraying paint containing the first optically transmissive components.
[0097] Once the paint is applied to the road surface substrate, the second optically transmissive component is applied to the surface of the painted coating. The second optically transmissive component is preferably applied at a surface density of between about 500 and 700 g/m2 such that the coating is substantially shielded from environmental air. Practically, road marking equipment will have two spray guns in proximate locale, a first spray gun for applying the paint and combined first optically transmissive components to the road, and a second bead spray gun for spraying the second optically transmissive components to follow the surface of the painted substrate.
[0098] Subsequently, the painted substrate and coating with the surface layer of second optically transmissive components are exposed to UV light for accelerated curing. As mentioned, the UV light source can be a LED based light source for efficient use of available electrical power and environmental robustness.
[0099] An example of a ground surface marker vehicle, such as a road marking vehicle is shown in Figure 1 . Other details of marker apparatus are described in New Zealand patent
743780, the contents of which are incorporated by reference. In particular, Figure 1 shows an exemplary arrangement and alignment of a paint spraying nozzle, a glass bead spraying nozzle and UV light source are shown. The vehicle 1 has a paint tank 2, a bead container 3, a pump (not shown), a generator 4, a paint applicator, for example a spray gun 5, a bead applicator, for example a bead dispenser 6, and a UV light module 7. The marking vehicle 1 is typically used to apply paint to a road to either create new road markings or to repaint existing road markings that are fading. The marking vehicle 1 may also be used for surfaces in off-road situations, for example for applying markings in car parks, schools, shopping centres factories, and warehouses. In use, the container 3 is filled with beads and the tank 2 is filled with paint.
[00100] A paint hose 9 connects the paint tank 2 to the spray gun 5. The hose 9 is preferably high pressure, polytetrafluoroethylene (“PTFE”)/Teflon™- lined, and light-shielded. A suitable pump is a low shear, high pressure pump capable of delivering paint from the tank 2 to the spray gun 5 within a range of 1 -3000 pounds per square inch (“PSI”). The paint spray gun 5 is preferably an automatic, airless spray gun with PTFE/Teflon™ low sheer seals. However other types of spray gun are also suitable, for example an air pressurised spray gun. The pump is able to deliver paint from the tank 2 to and from the spray gun 5. A bead hose 10 connects the bead container 3 to the dispenser 6. The container 3 is filled with reflectors in the form of beads such as conventional glass beads. The beads can be fed to the dispenser 6 by a pressure feeder (not shown). Alternatively, the beads can be moved to the dispenser 6 under gravity.
[00101 ] The UV light module 7 comprises a housing which preferably contains an LED UV light which is in turn powered, for example, by the generator 4. The UV light source is ideally surrounded by a light blocking device such as fringe of coarse bristles 13. The bristles 13 may be similar to those used in commercial and automotive dust, spray and light barriers.
[00102] In the preferred embodiment, to apply or to reapply road markings the marking vehicle 1 is driven by the operator to the correct position on the road. The operator determines the correct position by aligning the marking vehicle 1 as described above.
[00103] The operator drives forward and activates the pump, spray gun 5, bead dispenser 6 and the generator 4 to power the UV light module 7. The pump feeds paint to the spray gun 5 which applies paint to the road. The dry film thickness may be adjusted by the size of the spray tip and by the speed that the paint is applied. At the same time beads are fed to the dispenser 6, which is positioned behind the spray gun 5, and the beads are sprayed onto the road and are fully or partially embedded into wet paint as the marker 1 moves forward. The UV
light module 7, 1 1 powered by the generator 4, then passes over the bead-embedded paint and causes drying of the paint with embedded beads normally within about 0.5 to 1 .5 seconds.
[00104] Alternatively, there are two bead containers feeding beads of alternative sizes to two corresponding bead dispensers. The two bead dispensers 6 are mounted one behind the other, dispensing larger beads (for example, Type D beads) first followed by smaller beads (for example, Type B beads) after which the UV light causes drying of the paint with embedded beads of different sizes.
[00105] From the foregoing it will be appreciated that, although specific embodiments have been described herein for purposes of illustration, various modifications may be made without deviating from the spirit and scope of the invention. Accordingly, the invention is not limited except as by the appended claims and the elements recited therein. In addition, while certain aspects of the invention are presented below in certain claim forms, the inventors contemplate the various aspects of the invention in any available claim form. For example, while only some aspects of the invention may currently be recited as being embodied in a computer- readable medium, other aspects may likewise be so embodied.
Claims (40)
1 . A paint composition for painting a coating on a substrate adapted for accelerated cure by exposure to UV light, the composition comprising a paint formulation comprising:
• multifunctional acrylate oligomer in a concentration of between about 10 and 40% by weight;
• one or more of a multi and/or mono functional monomer of a concentration
between about 15 and 50% by weight;
• a photoinitiator;
• thiol and/or mercaptan ; and
• an acid functional acrylate.
2. A paint composition as claimed in claim 1 , wherein the paint composition further comprises a first optically transmissive component, comprising a particulate material adapted for substantial transparency to incident light of at least 365 to 405 nm.
3. A paint composition as claimed in claim 2, wherein the first optically transmissive component comprises quartz, nepheline syenite and/or feldspar filler.
4. A paint composition as claimed in claim 2 or claim 3, wherein the first optically transmissive component are from 1 to 70 microns diameter.
5. A paint composition as claimed in claim 2 or claim 3, wherein the first optically transmissive component are up to 50 microns diameter.
6. A paint composition as claimed in any one of claims 2 to 5, wherein the first optically
transmissive component is combined with the paint before painting the coating on the substrate.
7. A paint composition as claimed in any one of claims 1 to 6, wherein the paint composition further comprises a second optically transmissive component, comprising a material adapted for substantial transparency to incident light of at least 365 to 405 nm.
8. A paint composition as claimed in claim 7, wherein the second optically transmissive component further comprises at least one or glass beads, angled glass and/or quartz agglomerates.
9. A paint composition as claimed in any one of claim 7 or claim 8, wherein the second
optically transmissive component is generally spherical with an average diameter of from about 850 microns to about 1400 microns.
10. A paint composition as claimed in any one of claims 7 to 9, wherein the second optically transmissive component is adapted for combination with the paint formulation after application of the coating to the substrate.
1 1 . A paint composition as claimed in any one of claims 7 to 10, wherein the second optically transmissive component is applied at a surface density of about 400 to 500 grams per square metre.
12. A paint composition as claimed in any one of claims 7 to 1 1 , wherein the second optically transmissive component is applied at a surface density which substantially inhibits oxygen from contacting the coating.
13. A paint composition as claimed in any one of claims 1 to 12, wherein the acid functional acrylate is about 0.5 to 3 % by weight.
14. A paint composition as claimed in any one of claims 1 to 13, wherein the paint formulation further comprises a heat stabiliser constituent.
15. A paint composition as claimed in claim 14, wherein the heat stabiliser constituent
comprises about 0.1 to 0.5 % by weight.
16. A paint composition as claimed in any one of claims 1 to 15, wherein the paint formulation further comprises a wetting agent constituent.
17. A paint composition as claimed in claim 16, wherein the wetting agent constituent
comprises about 0.5 to 1 % by weight.
18. A paint composition as claimed in any one of claims 1 to 17, wherein the paint formulation further comprises a waxes constituent.
19. A paint composition as claimed in claim 18, wherein the waxes constituent comprises about 0.3 to 0.6 % by weight.
20. A paint composition as claimed in any one of claims 1 to 19, wherein the paint formulation further comprises a matting agent or precipitated silica constituent.
21 . A paint composition as claimed in claim 20, wherein the matting agent or precipitated silica constituent comprises about 1 to 5 % by weight.
22. A paint composition as claimed in any one of claims 1 to 21 , wherein the paint formulation further comprises a modified clays constituent.
23. A paint composition as claimed in claim 22, wherein the modified clays constituent
comprises about 0.5 to 2 % by weight.
24. A paint composition as claimed in one of claim 1 to 23, wherein the paint formulation further comprises pigments and/or fillers adapted to colour the paint formulation.
25. A paint composition as claimed in claim 24, wherein the pigments and/or fillers comprise one or more of titanium dioxide and/or organic yellow and/or orange pigments.
26. A paint composition as claimed in claim 24, wherein the titanium dioxide comprises about 5 to 13 % by weight.
27. A paint composition as claimed in claim 24, wherein the yellow and/or orange organic pigments comprises about 0.1 to 10 %.
28. A paint composition as claimed in any one of claims 1 to 27, wherein the one or more
multifunctional acrylate oligomer comprises one or more of epoxy acrylate, polyester acrylate and/or urethane acrylate.
29. A paint composition as claimed in any one of claims 1 to 28, wherein the multi and/or mono functional monomers comprises at least one of isobornyl acrylate,
hexanedioldiacrylate, versatic acid, vinyl ester, lauryl acrylate, tetra hydroxy furfuryl acrylate and/or phenoxy ethyl acrylate.
30. A paint composition as claimed in any one of claims 1 to 29, wherein the photoinitiator comprises bisacylphosphine oxide.
31 . A paint composition as claimed in any claim 30, wherein the bisacylphosphine oxide
comprises about 1 to 4 % by weight.
32. A paint composition as claimed in any one of claims 1 to 31 , wherein the paint formulation further comprises a defoamer in a range of about 0.1 to 0.5 % by weight.
33. A paint composition as claimed in any one of claims 1 to 33, wherein the thiol and/or
mercaptan comprises about 1 to 4 % by weight.
34. A paint composition as claimed in any one of claims 1 to 33, wherein the coating has a film thickness of up to about 400 micrometres when cured.
35. A paint composition as claimed in any one of claims 1 to 34, wherein the UV light has a wavelength in the range of about 365 to 405 nanometres.
36. A paint composition as claimed in any one of claims 1 to 35, wherein the UV light comprises by one or more LED components.
37. A road marking paint composition for painting a coating of a thickness up to 400 urn, when cured, on a road substrate adapted for accelerated cure by exposure to UV light, the composition comprising a paint formulation comprising:
• multifunctional acrylate oligomer in a concentration of between about 10 and 40% by weight;
• one or more of a multi and/or mono functional monomer of a concentration between about 15 and 50% by weight;
• a photoinitiator;
• thiol and/or mercaptan ; and
• an acid functional acrylate;
wherein the paint composition further comprises a first optically transmissive component, comprising a material adapted for substantial transparency to incident light of at least 365 to 405 nm mixed; and
wherein the coating comprises a second optically transmissive component,
comprising a material adapted for substantial transparency to incident light of at least 365 to 405 nm, the second optically transmissive component comprising a surface density of between about 500 and 700 g/m2
38. A method of painting a coating on a substrate, comprising the steps of:
spraying the paint formulation of any one of claims 1 to 37 to form the coating on the substrate; then
applying the second optically transmissive component to the coating,
wherein the second optically transmissive component is applied at a surface density of between about 500 and 700 g/m2 such that the coating is substantially shielded from environmental air; then
exposing the coating and applied second optically transmissive component to a UV light from a UV light source.
39. The method as claimed in claim 38, wherein the UV light has a wavelength in the range of about 365 to 405 nanometres.
40. The method as claimed in claim 38 or claim 39, wherein the UV light source comprises one or more LED components.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ75589919 | 2019-07-30 | ||
NZ755899 | 2019-07-30 | ||
PCT/NZ2020/050080 WO2021020975A1 (en) | 2019-07-30 | 2020-07-30 | Rapid cure paint technology |
Publications (1)
Publication Number | Publication Date |
---|---|
AU2020321843A1 true AU2020321843A1 (en) | 2022-02-24 |
Family
ID=74228970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2020321843A Pending AU2020321843A1 (en) | 2019-07-30 | 2020-07-30 | Rapid cure paint technology |
Country Status (6)
Country | Link |
---|---|
US (1) | US11773545B2 (en) |
EP (1) | EP4004124A4 (en) |
JP (1) | JP7212202B2 (en) |
AU (1) | AU2020321843A1 (en) |
CA (1) | CA3145513A1 (en) |
WO (1) | WO2021020975A1 (en) |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5863761A (en) * | 1981-10-12 | 1983-04-15 | Hitachi Chem Co Ltd | Protection of traffic paint |
JPH0610319A (en) * | 1992-06-26 | 1994-01-18 | Arakawa Chem Ind Co Ltd | Road sign and its formation |
JPH10183020A (en) * | 1996-12-24 | 1998-07-07 | Kictec:Kk | Road marking paint composition |
US6211260B1 (en) * | 1997-11-05 | 2001-04-03 | Showa Denko K.K. | Photocurable paint composition for road markings |
JPH11236517A (en) * | 1997-11-05 | 1999-08-31 | Atomix Co Ltd | Photohardenable paint composition for road sign |
JP2001026728A (en) * | 1999-07-13 | 2001-01-30 | Showa Denko Kk | Photocurable coating material composition for pavement marker |
JP3485506B2 (en) * | 1999-09-03 | 2004-01-13 | 昭和高分子株式会社 | Curable resin composition for reinforcing drainage road pavement and method for curing the same |
SG98433A1 (en) * | 1999-12-21 | 2003-09-19 | Ciba Sc Holding Ag | Iodonium salts as latent acid donors |
WO2007018287A1 (en) * | 2005-08-11 | 2007-02-15 | Kyowa Hakko Chemical Co., Ltd. | Resin composition |
TWI406840B (en) * | 2006-02-24 | 2013-09-01 | Fujifilm Corp | Oxime derivative, photopolymerizable composition, color filter, and process for producing the same |
CN101349865B (en) * | 2007-07-17 | 2012-10-03 | 富士胶片株式会社 | Photosensitive compositions, curable compositions, color filters, and method for manufacturing the same |
AU2010272714B2 (en) * | 2009-07-16 | 2013-03-14 | Röhm Gmbh | Binding agent for producing road markings ready quickly for traffic |
DE102009046251A1 (en) * | 2009-10-30 | 2011-05-19 | Evonik Röhm Gmbh | Reactive 1-component road markings |
DE102010002123A1 (en) * | 2010-01-26 | 2011-07-28 | Evonik Röhm GmbH, 64293 | Formulations for the production of road markings with adhesion on dry and moist soil |
EP2433716A1 (en) * | 2010-09-22 | 2012-03-28 | Hexagon Technology Center GmbH | Surface spraying device with a nozzle control mechanism and a corresponding method |
DE102011003317A1 (en) * | 2011-01-28 | 2012-08-02 | Evonik Röhm Gmbh | Impact-modified reaction resin |
JP5994618B2 (en) * | 2012-12-14 | 2016-09-21 | デクセリアルズ株式会社 | Photocurable resin composition and method for producing image display device using the same |
DE102013206116A1 (en) * | 2013-04-08 | 2014-10-09 | Evonik Industries Ag | New road markings to support the perception of the surroundings of vehicles |
KR101631228B1 (en) * | 2015-06-18 | 2016-06-17 | 휴먼코리아 주식회사 | A printing construction method of a building indoor and outdoor surfaces |
CN105368281A (en) * | 2015-11-24 | 2016-03-02 | 武汉广益交通科技股份有限公司 | Photosensitivity illuminating light-reflecting marking paint |
CN106752488B (en) * | 2016-08-31 | 2018-11-13 | 重庆南方漆业有限公司 | Road sign reflectorised paint and preparation method thereof |
-
2020
- 2020-07-30 AU AU2020321843A patent/AU2020321843A1/en active Pending
- 2020-07-30 EP EP20847880.0A patent/EP4004124A4/en active Pending
- 2020-07-30 JP JP2022505559A patent/JP7212202B2/en active Active
- 2020-07-30 WO PCT/NZ2020/050080 patent/WO2021020975A1/en active Search and Examination
- 2020-07-30 CA CA3145513A patent/CA3145513A1/en active Pending
-
2022
- 2022-01-28 US US17/649,323 patent/US11773545B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP4004124A4 (en) | 2023-08-02 |
JP7212202B2 (en) | 2023-01-24 |
US20220145555A1 (en) | 2022-05-12 |
US11773545B2 (en) | 2023-10-03 |
WO2021020975A1 (en) | 2021-02-04 |
JP2022535152A (en) | 2022-08-04 |
CA3145513A1 (en) | 2021-02-04 |
EP4004124A1 (en) | 2022-06-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN100445303C (en) | Environmentally friendly, 100% solids, actinic radiation curable coating compositions and coated surfaces and coated articles and coating methods and assemblages thereof | |
RU2003130275A (en) | METHOD FOR PRODUCING DECORATIVE PANELS | |
CN1121464C (en) | Transparent powder coating compositions for protecting surfaces | |
GB2505017A (en) | Forming self illuminating ground surface by coating sprayed base layer containing particles with photoluminescent liquid sealant | |
KR101045007B1 (en) | Method for road line marking | |
US11773545B2 (en) | Rapid cure paint technology | |
US3900605A (en) | Method of forming traffic markers having short track-free times | |
KR101837148B1 (en) | Thermoplastic paint composition for road marking using high luminance luminescent pigments | |
CN110951295B (en) | Reactive resin sealing material for multifunctional markers | |
US20120141785A1 (en) | Process for application of durable fast drying multi-coat organic coating system | |
US20150125669A1 (en) | Pre-Fabricated Marking System And A Method For Producing Said System | |
Petrukhina et al. | Preparation and use of materials for color road pavement and marking | |
WO2008141743A1 (en) | Photocurable compositions for road marking paint | |
KR20160031988A (en) | High adhesive spray paint and its packing and painting methods for road marker | |
CN201933434U (en) | Road marking with dicyclopentadiene modified unsaturated polyester resin paint | |
KR100352666B1 (en) | Method for road line marking | |
JPH05156614A (en) | Method and device of constructing road surface marking material for melting and road surface marking line drawn by using the same | |
US20140255602A1 (en) | Method and system for forming a reflective surface | |
WO2010014929A2 (en) | Process for forming a reflective surface | |
KR101043225B1 (en) | Paint compositions for surface sign of paved road and construction method of surface sign using the same | |
US10822755B1 (en) | Ground surface marker and method for surface marking | |
JP2000104230A (en) | Road signing method | |
JPH0610319A (en) | Road sign and its formation | |
AU2019246806B2 (en) | A ground surface marker and method for surface marking | |
WO2010016699A2 (en) | Novel composition for marking traffic lanes and traffic lane painting method using the same |